My research only shows that 165gr and 170gr bullets can be loaded.
You need to do more research!
I was wondering if there are heavier or lighter bullets for this rifle.
Yes.
About the only jacketed bullet common for the .32 Special is the 170gr FP. My old Lyman book (1970s) also lists a 137gr, 164gr, and 184gr cast bullets.
Literally, about any .32/8mm bullet close to the bore diameter can be used, with varying degrees of success, IF you load the ammo correctly for the bullet, and the gun. The listed bore of the .32 Special is .320-.321"
Finding reloading data for anything other than the usual 170gr and a few cast bullets will be problematical. Finding data with modern powders for anything other than the standard bullet will be serendipity. There may be some, ask the bullet makers...
Ammo loaded with anything other than the flat point, or blunt round nose bullet should be used as single shots, ONLY.
The history of the .32 Special is unique, and a bit interesting. In a way, its kind of the original cartridge version of "lite beer".
It was "more power, less fouling, shoots great!" sort of...
Early 1900s ads contain a lot of over-inflated (and sometimes outright bogus) claims, but they do still give a general intent. The early ads for the .32 Special said the round was intended for those who wanted more power than the .30-30, but less than the .30 Govt (.30-40 Krag) round.
The caliber and twist of the barrels meant when (re)loaded with black powder, they didn't foul "badly". (usually compared to the .30-30 with its smaller bore and faster twist)
Those same early ads also strongly warned against ordinary folks reloading with smokeless powder. They said it was dangerous if done by anyone other than the factory experts....
Personally, I think Winchester came up with the .32 Special as a way to sell their stock of .32 caliber barrels, when interest in the .32-40 began to wane...
One thing to be aware of, its been a "given" for generations that .32 Special barrels can lose their accuracy, well before they look like they should.
Meaning, compared to other calibers, a .32 Special bore can look good (not excessively worn), and still not shoot well, compared to an equally worn looking .30 cal barrel. Doesn't apply to every single one, of course, but enough of them have done this, over the years that its kind of expected, and has been written about in many places, for a long time now...
My Dad had a .32 Special, and it did it, sort of. With no change in anything we could determine, one year, it just decided to shoot everything 6" lower than the sights could be set for, from then on.
Not saying it will, but you should be prepared for the possibility that your 1949 94 might look great but not shoot great.
If it doesn't shoot well with standard ammo, don't give up all hope, there are things that can be tried (cast bullets) that might produce acceptable accuracy.
on the other hand, it might still shoot just as well as it ever did. Lots of 94s got used for generations without being shot all that much. Only shooting your gun will tell you what it does, or doesn't do.
Good Luck!